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Git Blame & Git Log -L: A “Time Machine” to Peer Into Every Line of Code’s History

By IT From Zero May 4, 2026

Master Git Blame and Git Log -L to deeply understand the context of changes on every line. These techniques help developers debug faster and avoid regressions in real-world projects.

MySQL

MySQL Router: The ‘Gatekeeper’ Enabling Automatic Failover and Fault Tolerance for InnoDB Clusters

By IT From Zero May 4, 2026

Don't let your database become a single point of failure. This guide covers how to set up MySQL Router to automate routing and failover for production InnoDB Clusters.

Docker

HTTPS for Local Docker: Setting Up a Pro “Green Padlock” with mkcert and Nginx

By IT From Zero May 4, 2026

How to configure HTTPS for Local Docker using mkcert and Nginx. Get a "green padlock" for virtual domains and test OAuth2 and Webhooks seamlessly.

Database

Deploying Patroni: The ‘Sleep Better’ Solution for PostgreSQL Administrators

By IT From Zero May 3, 2026

Database outages in the middle of the night are no longer a concern. A detailed guide on deploying Patroni to automate PostgreSQL Failover and ensure 24/7 availability.

Fedora

Preventing Brute-force Attacks on Fedora Server with Fail2ban: Don’t Leave SSH Doors Wide Open

By IT From Zero May 3, 2026

Don't let your Fedora Server crash due to brute-force attacks. Check out this guide to configuring Fail2ban to automatically block malicious IPs and secure SSH.

Linux

Slow Linux Boot? Use systemd-analyze to Trace and Optimize Immediately

By IT From Zero May 3, 2026

Don't let your Linux server boot slowly. Learn how to use systemd-analyze to track down bottlenecks and effectively optimize boot time in just a few steps.

Monitoring

Building a Centralized Logging System with Fluentd and OpenSearch: A Lightweight ELK Stack Alternative

By IT From Zero May 3, 2026

The days of SSH and 'tail -f' for logs are over. Build a lightweight centralized logging system with Fluentd and OpenSearch, using 1/10 the RAM of ELK Stack.

Security

Ditch VPNs, Use Cloudflare Access to Secure Internal Apps: Fast, Secure, and Effortless

By IT From Zero May 3, 2026

Forget VPNs! Learn how to use Cloudflare Access to protect internal dashboards and SSH with Google/GitHub SSO. 5-minute setup for enterprise-grade security.

Git

Git Patch & Git Apply: Instant Code Sharing Without Messing Up the Commit Log

By IT From Zero May 3, 2026

Share code quickly and keep a clean commit history without pushing or pulling. A detailed guide on using Git Patch and Git Apply for a professional workflow.

Development

Real-time Data Streaming with SSE in Node.js: Don’t Use WebSocket for Everything

By IT From Zero May 3, 2026

Don't use WebSocket for everything! Discover Server-Sent Events (SSE) - a lightweight, easy-to-implement real-time streaming solution in Node.js for one-way data flow.

Optimizing Redis RAM with HyperLogLog and Bloom Filter: Counting and Deduplicating at Scale

Building an Event-Driven Microservices System with Apache Kafka and NestJS: From Producer and Consumer to Dead Letter Queue (DLQ)

Installing and Configuring Rootless Docker: Run Docker Without Root to Protect Your Host

Configuring a PPPoE Server on Linux Using rp-pppoe for ISP Labs

A Guide to DiskCache in Python: Safe Multi-Process Disk Caching Without Redis

How to Configure Host sFlow on Linux: Real-Time Network Traffic and KVM Monitoring

Diagnosing and Resolving Deadlocks in PostgreSQL: Inspecting Lock Trees and Configuring Proper Timeouts

ESXi Host Configuration Backup and Restore with PowerCLI and ESXCLI: Saving Your Virtualization Cluster During Outages

Guide to VFIO PCIe Passthrough on Linux KVM: GPU Passthrough for Windows VMs

Integrating OpenTelemetry into Python: Practical Microservices Monitoring Strategies

Git Blame & Git Log -L: A “Time Machine” to Peer Into Every Line of Code’s History

MySQL Router: The ‘Gatekeeper’ Enabling Automatic Failover and Fault Tolerance for InnoDB Clusters

HTTPS for Local Docker: Setting Up a Pro “Green Padlock” with mkcert and Nginx

Deploying Patroni: The ‘Sleep Better’ Solution for PostgreSQL Administrators

Preventing Brute-force Attacks on Fedora Server with Fail2ban: Don’t Leave SSH Doors Wide Open

Slow Linux Boot? Use systemd-analyze to Trace and Optimize Immediately

Building a Centralized Logging System with Fluentd and OpenSearch: A Lightweight ELK Stack Alternative

Ditch VPNs, Use Cloudflare Access to Secure Internal Apps: Fast, Secure, and Effortless

Git Patch & Git Apply: Instant Code Sharing Without Messing Up the Commit Log

Real-time Data Streaming with SSE in Node.js: Don’t Use WebSocket for Everything